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Forage

Winterhawk

Common Name
Annual Ryegrass
Species
Lolium multiflorum
Uses
Hay
Pasture
Silage

Winterhawk was developed by Dr. Gordon Prine of University of Florida. Selected during several cold winters in Nebraska, Winterhawk is the premier winter hardy annual ryegrass. Excellent cold and frost tolerance allows Winterhawk to thrive in those regions where annual ryegrass is normally compromised by cold weather. Winterhawk is an excellent addition to a forage program for all species of livestock where wide adaptability is needed. 

  •  Excellent Cold Tolerance 
  •  Excellent Frost Tolerance 
  •  High Forage Yields 
  •  Excellent Palatability 
  •  Fast Germination and Establishment 

Details

  • Annual ryegrass can be planted almost year around. As long as nighttime temperatures are above 40 degrees and daytime temperatures are above 55 degrees, adequate germination and growth can be accomplished. Fall ... South: September through March, depending on location. Fall ... North: August through October. Spring: As soon as the temperatures are adequate. Can be frost seeded. If overseeding warm-season pastures, mow or graze warm-season grasses short before planting annual ryegrass to aid in establishment.

Trials

  • Louisiana Statewide

    2013-2014

    Winterhawk 11,221
    Marshall 11,195
    Fria 10,950
    Passerel Plus 9,487
    Gulf 8,699
  • Calhoun, GA

    2014-2015

    Winterhawk 13,969
    Marshall 13,793
    Fria 13,701
    Passerel Plus 11,329
    Lonestar 11,019
  • Starkville, MS

    2013-2014

    Winterhawk 6,498
    Marshall 6,301
    Fria 6,031
    Lonestar 5,394
    Nelson 5,286
  • Lexington, KY tons/acre

    2011-2012

    Winterhawk 3.72
    Marshall 3.19
    Fria 2.79
    Big Daddy 2.62
    Gulf 2.43

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